body{
    background-color: #979797;
}

div{
    overflow: hidden;
}

.cl{
    clear: both;
}

.wrapper{
    width: 98%;
    background-color: #fff222;
    margin: 0 auto; /*  水平居中  */
}

.header{
    width: 100%;
    background-color: #929aff;
    margin: 0 auto;
    min-height: 200px;
}

.main{
    width: 100%;
    background-color: #ffffff;
    margin: 0 auto;
}

.footer{
    width: 100%;
    background-color: #c7ff92;
    margin: 0 auto;
    min-height: 100px;
}

.sidebar{
    float: left;
    width: 189px;
    min-height: 600px;
    background-color: #ff77bb;
    padding-left: 10px;
    border-right: 1px dashed #fff222;
}

.right-side{
    float: right;
    width: 189px;
    min-height: 600px;
    background-color: #40a76b;
    padding-left: 10px;
    border-right: 1px dashed #fff222;
}

.content{
    /* float: left; */
    width: auto;
    min-height: 600px;
    background-color: #15ffff;
    margin: 0 205px;  /*  sidebar 200px + 设计2个div间的间距5px */
}